68181317 has 2 divisors, whose sum is σ = 68181318. Its totient is φ = 68181316.

The previous prime is 68181313. The next prime is 68181331. The reversal of 68181317 is 71318186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48874081 + 19307236 = 6991^2 + 4394^2 .

It is a cyclic number.

It is not a de Polignac number, because 68181317 - 2² = 68181313 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68181313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34090658 + 34090659.

It is an arithmetic number, because the mean of its divisors is an integer number (34090659).

Almost surely, 2^68181317 is an apocalyptic number.

It is an amenable number.

68181317 is a deficient number, since it is larger than the sum of its proper divisors (1).

68181317 is an equidigital number, since it uses as much as digits as its factorization.

68181317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 68181317 is about 8257.1978903257. The cubic root of 68181317 is about 408.5279693324.

The spelling of 68181317 in words is "sixty-eight million, one hundred eighty-one thousand, three hundred seventeen".